.up{
	width:1300px;
	margin: 0px auto;	
}

.cen1{
	width: 600px;
	background-color: green;
	position: absolute;
	top:50px;
	left: 0px;
}

.cen2{
	width: 600px;
	background-color: blue;
	position:absolute; 
	top:50px;
	left: 600px;
}

.cen3{
	width: 600px;
	background-color: yellow;
	position:absolute;
	top:50px;
	right: 0px;
}
.bot{
	width: 1800px;
	background-color: gray;
	position:absolute;
	bottom: 0;
	left: 0px;
}
li{
	  list-style:none;
	
	 
	  
}
.up_li{
	  display: inline-block;	  
	  float: left;
	  position: relative;
	  margin-left: 50px;	  
	  letter-spacing: 3px; 
	    
}
a{
	text-decoration: none;
}
 .up_li a:visited{
 	color:burlywood;
 }
 .up_li a:hover{
 	color: #FFFF00;
 }
.up_li a:active{
 	color: #0000FF;
 }
 
 .up_lis{
 	font-size: 12px;
 }
 
 .up_li ul{
 	display: none;
 }
 
.up li:hover ul{
	display: block;
	position: relative;
	top:10px;
	left:1px;
	background-color: antiquewhite;
	padding: 5px;
	
}

